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1 // Copyright 2010 the V8 project authors. All rights reserved. | 1 // Copyright 2010 the V8 project authors. All rights reserved. |
2 // Redistribution and use in source and binary forms, with or without | 2 // Redistribution and use in source and binary forms, with or without |
3 // modification, are permitted provided that the following conditions are | 3 // modification, are permitted provided that the following conditions are |
4 // met: | 4 // met: |
5 // | 5 // |
6 // * Redistributions of source code must retain the above copyright | 6 // * Redistributions of source code must retain the above copyright |
7 // notice, this list of conditions and the following disclaimer. | 7 // notice, this list of conditions and the following disclaimer. |
8 // * Redistributions in binary form must reproduce the above | 8 // * Redistributions in binary form must reproduce the above |
9 // copyright notice, this list of conditions and the following | 9 // copyright notice, this list of conditions and the following |
10 // disclaimer in the documentation and/or other materials provided | 10 // disclaimer in the documentation and/or other materials provided |
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173 | 173 |
174 friend class SafepointTableBuilder; | 174 friend class SafepointTableBuilder; |
175 friend class SafepointEntry; | 175 friend class SafepointEntry; |
176 | 176 |
177 DISALLOW_COPY_AND_ASSIGN(SafepointTable); | 177 DISALLOW_COPY_AND_ASSIGN(SafepointTable); |
178 }; | 178 }; |
179 | 179 |
180 | 180 |
181 class Safepoint BASE_EMBEDDED { | 181 class Safepoint BASE_EMBEDDED { |
182 public: | 182 public: |
| 183 typedef enum { |
| 184 kSimple = 0, |
| 185 kWithRegisters = 1 << 0, |
| 186 kWithDoubles = 1 << 1, |
| 187 kWithRegistersAndDoubles = kWithRegisters | kWithDoubles |
| 188 } Kind; |
| 189 |
183 static const int kNoDeoptimizationIndex = | 190 static const int kNoDeoptimizationIndex = |
184 (1 << (SafepointEntry::kDeoptIndexBits)) - 1; | 191 (1 << (SafepointEntry::kDeoptIndexBits)) - 1; |
185 | 192 |
186 void DefinePointerSlot(int index) { indexes_->Add(index); } | 193 void DefinePointerSlot(int index) { indexes_->Add(index); } |
187 void DefinePointerRegister(Register reg); | 194 void DefinePointerRegister(Register reg); |
188 | 195 |
189 private: | 196 private: |
190 Safepoint(ZoneList<int>* indexes, ZoneList<int>* registers) : | 197 Safepoint(ZoneList<int>* indexes, ZoneList<int>* registers) : |
191 indexes_(indexes), registers_(registers) { } | 198 indexes_(indexes), registers_(registers) { } |
192 ZoneList<int>* indexes_; | 199 ZoneList<int>* indexes_; |
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203 indexes_(32), | 210 indexes_(32), |
204 registers_(32), | 211 registers_(32), |
205 emitted_(false) { } | 212 emitted_(false) { } |
206 | 213 |
207 // Get the offset of the emitted safepoint table in the code. | 214 // Get the offset of the emitted safepoint table in the code. |
208 unsigned GetCodeOffset() const; | 215 unsigned GetCodeOffset() const; |
209 | 216 |
210 // Define a new safepoint for the current position in the body. | 217 // Define a new safepoint for the current position in the body. |
211 Safepoint DefineSafepoint( | 218 Safepoint DefineSafepoint( |
212 Assembler* assembler, | 219 Assembler* assembler, |
213 int deoptimization_index = Safepoint::kNoDeoptimizationIndex); | 220 Safepoint::Kind kind, |
214 | |
215 // Define a new safepoint with registers on the stack for the | |
216 // current position in the body and take the number of arguments on | |
217 // top of the registers into account. | |
218 Safepoint DefineSafepointWithRegisters( | |
219 Assembler* assembler, | |
220 int arguments, | 221 int arguments, |
221 int deoptimization_index = Safepoint::kNoDeoptimizationIndex); | 222 int deoptimization_index = Safepoint::kNoDeoptimizationIndex); |
222 | 223 |
223 // Define a new safepoint with all double registers and the normal | |
224 // registers on the stack for the current position in the body and | |
225 // take the number of arguments on top of the registers into account. | |
226 // TODO(1043) Rewrite the three SafepointTableBuilder::DefineSafepoint | |
227 // methods to one method that uses template arguments. | |
228 Safepoint DefineSafepointWithRegistersAndDoubles( | |
229 Assembler* assembler, | |
230 int arguments, | |
231 int deoptimization_index = Safepoint::kNoDeoptimizationIndex); | |
232 | |
233 // Update the last safepoint with the size of the code generated for the gap | 224 // Update the last safepoint with the size of the code generated for the gap |
234 // following it. | 225 // following it. |
235 void SetPcAfterGap(int pc) { | 226 void SetPcAfterGap(int pc) { |
236 ASSERT(!deoptimization_info_.is_empty()); | 227 ASSERT(!deoptimization_info_.is_empty()); |
237 int index = deoptimization_info_.length() - 1; | 228 int index = deoptimization_info_.length() - 1; |
238 deoptimization_info_[index].pc_after_gap = pc; | 229 deoptimization_info_[index].pc_after_gap = pc; |
239 } | 230 } |
240 | 231 |
241 // Emit the safepoint table after the body. The number of bits per | 232 // Emit the safepoint table after the body. The number of bits per |
242 // entry must be enough to hold all the pointer indexes. | 233 // entry must be enough to hold all the pointer indexes. |
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259 | 250 |
260 bool emitted_; | 251 bool emitted_; |
261 unsigned offset_; | 252 unsigned offset_; |
262 | 253 |
263 DISALLOW_COPY_AND_ASSIGN(SafepointTableBuilder); | 254 DISALLOW_COPY_AND_ASSIGN(SafepointTableBuilder); |
264 }; | 255 }; |
265 | 256 |
266 } } // namespace v8::internal | 257 } } // namespace v8::internal |
267 | 258 |
268 #endif // V8_SAFEPOINT_TABLE_H_ | 259 #endif // V8_SAFEPOINT_TABLE_H_ |
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